Apollo 13 Describe how the flight controllers developed and used models. What kind of drawings might they have used to solve the problem
Answer:
In order to power the fuel cells that provided most of the electricity used during the flight, the Apollo spacecraft carried two tanks of liquid hydrogen and two tanks of liquid oxygen. ... The testing team decided to solve this problem by heating the tank overnight to force the liquid oxygen to burn off
A series RLC circuit consists of a 100 W resistor, a 0.15 H inductor, and a 30 µF capacitor. It is attached to a 120 V/60 Hz power line (the voltage 120V is the root mean square value). What are
a. The emf εrms
b. The phase angle ϕ
c. The average power loss
(a) The root mean square value of current in the circuit is 1.14 A.
(b) The phase angle ϕ of the circuit is 17.7⁰.
(c) The average power loss in the circuit is 136.4 W.
Capacitive and inductive reactance of the RLC circuitThe capacitive and inductive reactance of the series RLC circuit is calculated as follows;
Xc = 1/ωC
[tex]X_c = \frac{1}{2\pi f C} = \frac{1}{2\pi (60)(30 \times 10^{-6})} = 88.42 \ ohms[/tex]
Xl = ωL
Xl = 2πfL
Xl = 2π(60)(0.15)
Xl = 56.55 ohms
Impedance of the circuitThe impedance of the circuit is calculated as follows;
[tex]Z = \sqrt{R^2 + (X_c - X_l)^2} \\\\Z = \sqrt{100^2 + (88.42 -56.55)^2} \\\\Z = 104.96 \ ohms[/tex]
Rms current of the circuit[tex]I_{rms} Z = V_{rms}\\\\I_{rms} = \frac{V_{rms}}{Z} \\\\I_{rms}= \frac{120}{104.96} \\\\I_{rms}= 1.14 \ A[/tex]
Phase angleThe phase angle of the circuit is calcuated as follows;
[tex]tan \phi = \frac{X_c - X_l}{R} \\\\tan\phi = \frac{88.42 - 56.55}{100} \\\\tan\phi = 0.3187\\\\\phi = tan^{-1}(0.3187) \\\\\phi = 17.7 \ ^0[/tex]
Average power loss in the circuitThe average power loss in the circuit is calculated as follows;
[tex]P = I_{rms}^2 Z\\\\P = (1.14)^2 (104.96)\\\\P = 136.4 \ W[/tex]
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What is the equation for area
Answer:
l×b is the equation of area
Ayuda porfavor......
Answer:
yayayyayaaayaaaayyayayayayaayaaayayayayayayya
2
Tech A says the Wengine consists of two VR cylinder banks in a
deeper V arrangement to each other. Tech B says rotary engines are
very powerful for their size, but they do not use conventional pistons
that slide back and forth inside a straight cylinder. Who is correct?
of
Answer:tech A
Explanation:
Which of the following does the electrical technician typically use?
Answer:
What are the choices?
Studies show that chlorofluorocarbons (CFCs) such as CFC-12, are contributing to the depletion of the
stratospheric ozone layer.
A) True
B) False
Answer:
true
Explanation:
True .the chlorofluorocarbons also known as CFC’s also contribute on depleting the ozone layer
If a motor or transformer has a low-frequency hum, what can be done to reduce/ eliminate the noise?
define architecture and Civil engineering in brief
Explanation:
While architects are responsible for the design and planning of structures ranging from houses and factories to skyscrapers and museums, civil engineers oversee the entire design-to-completion process for buildings, roads, dams, bridges, water systems, and other major works.
Technician A says that to remove the rod caps on an engine, start by positioning the number 3 piston at top dead center. Technician B says that to remove the rod caps on an engine, start by positioning the number 1 piston at bottom dead center. Who is correct
Answer:
B.
Explanation:
Removing the rod caps on an engine, start by positioning the number 1 piston at bottom dead center is the correct way to remove them.
A tensile load of 5 kN was loaded on a 25 cm circular metal rod of diameter 1 cm,
causing an extension to be 0.0227 cm. Determine the value of Young’s modulus, E,
of the metal.
Answer:
70 GPa my guyyyy
Explanation:
Evaluate this design by describing the criteria it does or
does not meet
Answer:
Personal water filters solve the problem of having access to safe drinking water anywhere. They are available and affordable. The materials used to make them are durable. They protect, rather than harm, users. Overall, the benefits outweigh the risks.
Explanation:
i just know its right because its the sample response :D
The personal water filter meets the following requirements: It cleans tap water for domestic use, is reasonably priced, and is easy to transport.
What is water filter?A water filter reduces water contamination through the use of a thin physical barrier, a chemical reaction, or a biological reaction to remove contaminants.
Conditions were satisfied in the example scenario:
Functionality: The personal water filter is capable of effectively removing germs and other pollutants from water.The filter is portable and convenient to use while traveling or camping because it is small and light.Affordability: The filter is a reasonable solution for those on a tight budget, costing around $20 or so.Durability: The filter can resist the wear and tear of continuous use thanks to its durable plastic design.Unmet requirements:
Heavy Metal Removal: In locations where water sources are tainted with such substances, the filter's inability to remove heavy metals from water raises some questions.In locations where water supplies are contaminated with these bacteria, the filter's ineffectiveness at removing viruses may be a problem.In regions where only saltwater is accessible, the filter's inability to remove salt from the water could be a problem.Longevity: The filter is sturdy, however depending on usage, it might not last as long as other filtering systems and might need to be changed rather frequently.Thus, these are the criteria it does or does not meet.
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Solve the inequality. Then graph your solution.
-9v – 10 < 7y +6
TEST ANSWER
PLS IGNORE
the need of families and suitability for the local____ have contributed to the structural styles of homes
Answer:
environment
Explanation:
the environment has different resources
What is the weight of a steel plate in the shape of a circle with a diameter of 10'? The steel weighs 14 Ib per Ft2
LIST the differences between softwood and hardwood
Answer:
Hardwood is usually denser than softwood.
Softwood is cheaper than hardwood.
Hardwood has good fire resistance while softwood has poor fire resistance.
Softwood is lighter than hardwood.
TEST ANSWER
PLS IGNORE
during a load test, a battery's voltage drops below a specific value. what action should the technician take?
A. Recharge and retest.
B. Allow battery to become fully discharged and retest.
C. immediately replace
D. None if above
Answer:
B
Explanation:
allow battery to become fully discharged and retest
When fully charged, a normal 12-volt automotive battery will have about 12.6 volts. The voltage just needs to fall to about 10.5 volts to be deemed fully discharged. The battery will suffer harm owing to severe sulfation if it falls below that level. Thus, option B is correct.
What battery's voltage drops below a specific value?Changes in Voltage Occur During Discharge, The voltage of each cell is approximately 2.5 to 2.7 volts before the charging circuit is opened at the conclusion of a charge. The voltage of the cell rapidly reduces to roughly 2.1 volts within three or four minutes of the charging circuit being opened.
The voltage across the battery terminals decreases if a load is connected across the battery. The battery's internal resistance is to blame for this voltage drop. By measuring the open-circuit voltage and the voltage across the battery's terminals when a load is connected, we can determine the internal resistance.
Therefore, allow battery to become fully discharged and retest should the technician take.
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Which of these does OSHA require employers to construct and install to minimize electrocution hazards?
Answer:
OSHA requires that the exposed and operating elements of an electrical installation, lighting, equipment, motors, machines, appliances, switches, controls, and enclosures must be constructed and installed so as to minimize workplace electrocution hazards.
Student A says hazardous waste can take the form of solid, liquid, or gas. Student B says hazardous waste can only take the form of a solid. Who is correct?
Group of answer choices
Both A and B
Neither A nor B
Student A
Student B
Answer:
Student A
Explanation:
hope this helps have a great day
3. Which of these tools is typically not used by Automotive Technicians?
A. Oxyfuel Cutting Equipment
B. Diagnostic Computers
C. Defibrillator
D. Test Instruments
The answer is "Option c", and more explanation can be defined as follows:
Automotive and mechanical service technicians alter their vehicles using oil. Autonomous service technicians and mechanics often referred to as service technicians or services technology experts, inspection, repair, and maintenance of automobiles & commercial vehicles.It contains fundamental rectangles, wrenches, sockets, flips & pinions. Tool to measure torques: As a technician, you will always take things apart and reassemble them. These tools tighten the attachments so that pieces can be reassembled properly. It uses oxyfuel cutters, diagnostic computers, and test instruments.Therefore, "Option C" is correct.
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what are the materials and tools used to build a headgear?
e) What are the major jobs of a nurse?
Answer:
the major jobs of a nurse are
1.to take care of patients
2.to give medicine to patients in time
3.to help doctors in operation time
Employees are working within an excavation that is more than 4 foot deep and cannot safely exit the site. What is a hazard that needs to be addressed in this situation?
Select the best option.
Access/Egress
Oxygen Deficiency and Toxic Fumes
Water Accumulation
A hazard that needs to be addressed in the given situation is Access/Egress. Option A is correct.
What is the significance of Access and Egress?When handling a security or emergency scenario, access and egress points are crucial. It is crucial to have rapid access to and exit from the building in case of an emergency.
Planning entrance and egress locations should be done while creating evacuation routes. A safe escape that people can use in an emergency is called emergency egress. In an emergency circumstance like a fire, emergency access and escape are crucial.
In the given case, Employees are working within an excavation that is more than 4 foot deep and cannot safely exit the site, this is clearly deined that the Access/Egress is a hazard that must be dealt.
Therefore, option A is correct.
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5. If you use pipe in a footing drain, there should be surface clean-out(s) located
O A. right next to the house.
O B. every 50 ft.
O C. every 100 ft
O D. near the discharge point,
Answer:
b because if u got the sewer and septic system
Explain how metal is produced and turned into a product e.g. bed
Answer:
the metal is mined from mines and melted to make objects
What efc number will enable a student to receive the full amount of a pall grant
[tex]\tt \ huge \orange{ oh }[/tex]
What is equation for surface area?
Answer:
Surface area is the sum of the areas of all faces (or surfaces) on a 3D shape. pls mark me branilest
lu
22. The word biodegradable on a label doesn't necessarily mean a product is environmentally safe.
A) O True
B) O False
Which event is an example of science helping engineering?
A. Knowledge of local geology helps in the design of a dam for a
reservoir.
B. A new type of telescope helps people learn new facts about
comets.
C. A new type of computer makes weather forecasts more accurate.
D. Satellite imaging allows people to map the extent of forest fires.
An event that is an example of science helping to engineer is Knowledge of local geology helps in the design of a dam for a reservoir. Thus the correct option is A.
What is Science?Science is the systematic, evidence-based scientific investigation and implementation of knowledge and perception of the natural and social world which provides information about various things to an individual.
Combining math and science to tackle issues usually defines the functions of engineering. Engineers are the ones who translate advances in science into practical applications.
The individual who studies Science is referred to as a Scientist whereas those studies about engineering are referred to as Engineers.
When the design of a dam for a reservoir is created Science helps engineering by providing information and knowledge about Local Geology to help them.
Therefore, option A is appropriate.
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The ratio of boys to girls in the class was 2 to 3. If there were 18 girls in the class, how many students were in the class